Abstract
The availability of microalgae (phytoplankton) has an important role in aquaculture.
Nannochloropsis sp. is a microalgae that can be used as the live feed for larvae
cultivation of shrimp, fish and shellfish. In this study, a Nannochloropsis sp. isolate
obtained from Lampung Mangrove Center waters was cultured by using combination
of agricultural fertilizer as a substitute for pro analyze fertilizer (Conway). The aims
of this research were to investigate the cell density (cell/L), the growth rate of cell, and
doubling time of isolates Nannochloropsis sp. from the waters of Lampung Mangrove
Center, which were cultured intermediately with the volume of 100 L. This research
was designed using completely randomized design (CRD), with 5 treatments of
agricultural fertilizer consisted of A: Urea 40, ZA 20, TSP 5 ppm, B: Urea 40, ZA 20,
TSP 10 ppm, C: Urea 40, ZA 20, TSP 15 ppm, D: Urea 40, ZA 20, TSP 20 ppm, and
E: Conway and vitamin B12 1 ppm (control), with 4 replications. The results showed
that th e treatment of A produced the highest cell density and the fastest growth rate (p
<0.050) compared with the others. In addition, the treatment of A showed the fastest
doubling time significantly (p <0.050) to B, D, and E treatments, but it is not in
significant difference with the treatment of C (p=0.065). It was concluded that the
combination of the agricultural fertilizer treatment A was the best for growth rate of
Nannochloropsis sp. in intermediate culture.
Tugiyono, Agus Setiawan, Emy Rusyani, Erlin Gustina, Suharso. (2018) Combination of agriculture fertilizer for intermediate cultivation of isolate Nannochloropsis sp. of the waters of Lampung Mangrove Center as live feed, Asian Journal of Agriculture and Biology, Volume 6, Issue 4.
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